From 0cb8517dc658ab0a785c34e4d5582459e9263fb8 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Fri, 25 Sep 2015 17:21:28 +0000
Subject: AMDGPU: Fix recomputing dominator tree unnecessarily

SIFixSGPRCopies does not modify the CFG, but this was
being recomputed before running SIFoldOperands.

llvm-svn: 248587
---
 llvm/lib/Target/AMDGPU/SIInsertWaits.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'llvm/lib/Target/AMDGPU/SIInsertWaits.cpp')

diff --git a/llvm/lib/Target/AMDGPU/SIInsertWaits.cpp b/llvm/lib/Target/AMDGPU/SIInsertWaits.cpp
index b47c09bc9b6..7ab4fd68932 100644
--- a/llvm/lib/Target/AMDGPU/SIInsertWaits.cpp
+++ b/llvm/lib/Target/AMDGPU/SIInsertWaits.cpp
@@ -121,9 +121,13 @@ public:
   bool runOnMachineFunction(MachineFunction &MF) override;
 
   const char *getPassName() const override {
-    return "SI insert wait  instructions";
+    return "SI insert wait instructions";
   }
 
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesCFG();
+    MachineFunctionPass::getAnalysisUsage(AU);
+  }
 };
 
 } // End anonymous namespace
-- 
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